Exelon's 2 Braidwood reactors shut down

(AP) — Both reactors at Exelon Corp.'s nuclear power plant in Braidwood have shut down, and the company is looking for the source of the problem.

Exelon spokesman Marshall Murphy and Nuclear Regulatory Commission spokesman Scott Burnell both say the situation isn't a safety concern. The Braidwood Generating Station is about 50 miles southwest of Chicago.

Murphy says the power-generating units shut down early Monday. Steam is being vented from the plant to reduce pressure in its steam generators.

The NRC spokesman says that noise is loud and can be heard by people in the area.

The company isn't sure when the 2,300-megawatt plant will start up again.